Citro2-Kleen combines oxygen and citrus technology to create an environmentally friendly, water-based, multi-purpose cleaner for all architectural surfaces.


Citro2-Kleen is a concentrated, environmentally friendly, biodegradable, multi-surface cleaner that utilizes oxygen and hydrogen as well as powerful citrus extract to provide the next generation in cleaning technology. This product is extremely effective when used with heated, deionized water. This product is designed for high-performance building restoration and preservation applications.


  • Aggressive stain-fighting capabilities
  • Oxygen fights stains caused by biological contamination, mold, black and green algae
  • 100% natural and organic
  • Citrus extract fights oil and grease stains
  • Perfect for multi-story, highly populated restoration projects
  • Pleasant, natural citrus fragrance improves work environment
  • Powerful foaming action on contact
  • Quickly removes malodors
  • Biodegradable
  • Concentrated formula has very low level of toxicity
  • Oxidizes surfaces
  • Overspray won’t harm vehicles
  • Can be used within a pressure washer
  • Environmentally friendly and safe to use
  • Contains no phosphates or petroleum distillates
  • Undiluted product is non-flammable and non-combustible
  • Diluted solutions are non-toxic to aquatic life
  • Use of solution does not contribute to smog formations or poor indoor air quality
  • Leaves little to no residue
  • Easy to use

Intended Surfaces 

This product is formulated for use on stone, metal, glass and painted surfaces. 


We recommend the use of one of Presto's stone protective treatments to protect the newly restored surface for years: 
  • Leach Stop® – Mineral Leaching Mitigation Treatment™
  • ElaSticone® – Silicone sealer for concrete, masonry and stone surfaces
  • ElaSticone® GSX – Silicone with graffiti protection for concrete, masonry and stone surfaces
  • Protect-A-Stone® – High-performance oil protection for stone surfaces
  • ReJuviSeal® – Rejuvenating oil protection for stone surface

Coverage Rates 

250 to 10,000 sq. ft. per gal. depending on dilution rate.


Product can be diluted to any concentration needed.
  • Heavy Duty – This product may be used undiluted. 
  • Medium Duty – Dilute 35-65% with water. 
  • Light Duty – Dilute 10-35% with water.
Necessary Equipment 
  • Protective gear
  • Running water
  • Deionized water tank (optional)
  • Chemical sprayer  (optional)
  • Pressure washer (optional)
  • Stone brush (optional)
Citro2-Kleen Product Info Chart
SolventWater Based
User FriendlyYes
Economically EfficientYes
Environmentally FriendlyYes

Surface Preparation 

Remove as much surface buildup as possible prior to using Citro2Kleen. We recommend heated, deionized water to remove surface buildup, and to rinse the surface after product application.


This product can be used with a sprayer or any chemical injection applicator. Using a pump sprayer, apply Citro2-Kleen to the surface using a side to side wetting pattern starting at the bottom and working upward. Make sure to fully and evenly soak the entire surface. Allow the product to soak on the surface as long as possible without drying. Reapply the product if areas become dry. Rinse using a pressure washer or water hose.  Rinse all product from the surface. If heavy soils are present and it appears necessary, use a strong, short-bristled brush to agitate the surface.

If necessary, apply a second or third treatment to the surface and repeat the process as previously described. When finished, make sure to rinse the surface multiple times to ensure no residue is left behind – especially when a water repellent is to be applied afterwards. 

This product will not harm the surface and can be applied as many times as needed. The product will work without the use of deionized water; however, it is recommended for superior performance. 

Situations including various stone types or different natured stains may require multiple products. Presto’s stone cleaning line includes:

  • Stone Restore® HD For difficult to remove mineral stains caused by efflorescence, rusting, red clay, iron, and more 
  • Stone Restore® NC For general cleaning of sensitive stone surfaces that require a neutral cleaner
  • Stone Restore® A+ For heavy stains caused by oil, grease, grime and environmental pollution 
  • Stone Restore® CT A multi-purpose stone cleaner that removes a variety of stains from all types of stone materials 


The information provided by Presto for the safe and effective use of this product, and all of our products, is believed to be good and accurate. However, due to the many different possible applications of this product, careful considerations should be made when selecting its suitability for each surface.

The information provided should never be substituted for individual testing to ensure the product’s compatibility with each surface intended for use. The purchaser shall assume all responsibility for determining the suitability of this product. When used as intended, this product will perform as stated. No other warranty can be made for this product, verbally or written.

Presto warrants this product to be free from defects. In the event this product is found to be defective, we will provide a sufficient amount of product to replace the defective product.


View our Stone Restoration Pictures Featuring projects that utilized our many products for their buildings restoration, maintenance or cleaning project.

After cleaning or sealing stone surfaces the glass windows and metal frames almost always need to be cleaned, and many time window spots and stains removed as well. View our glass and metal products that compliment our stone restoration and protection arsenal.


Purchase 5 Gallon Pail for $232.50

Citro2-Kleen is special order only. Allow 1 to 2 weeks to manufacture and ship. For cleaning stone surfaces that have been previously protected with Presto's Stone protective treatments such as Leach Stop or ElaSticone use Green-Kleen. For more aggressive cleaners for stone surfaces that are not protected with Presto's Stone protective treatments view the Stone Restore Series.
Justin McGarty,
May 11, 2012, 11:53 AM
Justin McGarty,
May 18, 2012, 3:22 PM